package cn.tta.interceptor;

import cn.tta.common.constant.JwtClaimsConstant;
import cn.tta.common.context.BaseContext;
import cn.tta.common.properties.JwtProperties;
import cn.tta.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌校验的拦截器
 */
@Slf4j
@Component
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        // 从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());

        try {
            log.info("jwt校验:{}",token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userID = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("当前用户id:{}",userID);
            BaseContext.setCurrentId(userID);
            return true;
        }catch (Exception e ){
            // 不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
